diff options
Diffstat (limited to 'src/cpu/amd/model_fxx')
| -rw-r--r-- | src/cpu/amd/model_fxx/model_fxx_init.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/cpu/amd/model_fxx/model_fxx_init.c b/src/cpu/amd/model_fxx/model_fxx_init.c index 0608d0ae42..ce5c810821 100644 --- a/src/cpu/amd/model_fxx/model_fxx_init.c +++ b/src/cpu/amd/model_fxx/model_fxx_init.c @@ -24,6 +24,7 @@ #include <cpu/cpu.h> #include <cpu/x86/cache.h> #include <cpu/x86/mtrr.h> +#include <cpu/x86/smm.h> #include <cpu/amd/multicore.h> #include <cpu/amd/model_fxx_msr.h> @@ -547,6 +548,21 @@ static void model_fxx_init(device_t dev) */ if (id.coreid == 0) init_ecc_memory(id.nodeid); // only do it for core 0 + + /* Set SMM base address for this CPU */ + msr = rdmsr(SMM_BASE_MSR); + msr.lo = SMM_BASE - (lapicid() * 0x400); + wrmsr(SMM_BASE_MSR, msr); + + /* Enable the SMM memory window */ + msr = rdmsr(SMM_MASK_MSR); + msr.lo |= (1 << 0); /* Enable ASEG SMRAM Range */ + wrmsr(SMM_MASK_MSR, msr); + + /* Set SMMLOCK to avoid exploits messing with SMM */ + msr = rdmsr(HWCR_MSR); + msr.lo |= (1 << 0); + wrmsr(HWCR_MSR, msr); } static struct device_operations cpu_dev_ops = { |